﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <div>
        <input type="button" id="btn" value="点我" />
        <img src="../css/image/79ba98972e4154bd4986a4821f6a84d9.jpg" alt="Alternate Text" id="mv"/>
    </div>
    <script>
        var btn = document.getElementById('btn');
        var mv = document.getElementById('mv');
        btn.onclick = function () {
            mv.src = '../css/image/775eeda1bbaf7e4b5bb59343cb03dd94.jpg';
        }
    </script>
</body>
</html>